Road and process of making it.



E. A. PATERSON. ROAD AND PROCESS OF MAKING IT.

APYLIGATIOK FILED JAN. 20, 1911.

Patented June 27, 1911.

Sit/GATE Jumqm z/m LIME/four fi'fiolmv 670M W TNESES seamsn rED orarngrarrnnr OFFICE.

ALFRED PATIERSU'N, OF PORT ARTHUR, ONTARIO, CANADA.

ROAD AND PROCESS 01? MAKING IT.

Specification of Letters Patent. Patented J 11119 27, 1911 (iriginal application filed June 20, 191G, Serial 110. 567,959. Divided and this application filed January 20,

To all ibliomtt may concern:

Be it known that I, Enwnno ALFRED Pnrnnson', a subject of the King of Great Britain, and at present rcsidingat Port Arthur, in the Province of Qntario, Canada, have invented certain new and useful Inn" provenients in Roadsand Processes of Male ing Them, of which the following is a specification.

According to this invention Inacadam and other roads are made in an improved way by the use of new materials applied in a novel manner.

Broadly stated the invention consists in using in the construction of roads materials which, as the road Wears away and. they are exposed to the atmosphere, will undergo certain chemical changes that render them harder, more durable and better binding agcl'its for the I()(;( or gravel with which they are associated.

T he accompanying drawing is a perspectivewiew of a section of road, the preferred cmnposition of the road being specified on the drawing.

In carrying out my invention I provide a solution consisting of sucrate of lime and an alkaline silicate, such as silicate of soda, which I mix with carlxmate of lime or other limerock, or a combination of limerock and phosphate of alumina rock, to produce a matrix for binding the crushed rock or gravel, or other like material or road metal ordinarily used in the construction of roads. \Vhen the solution of sucrato of lime and silicate of soda is mixed with the limerock and spread into a layer the crushed rock, gravel or like material, is spread over it and rolled down in such manner as to causx: the rock or gravel to sink and the matrix to rise and until grout appears on the surface, which latter is swept over the surface to fill all rcma l ning in terr-lticcs.

Below the surface the sucratc of lime and the silicate of soda remain as such in the matrix, while on the surface of the matrix the carbonic acid of the atmosphere dccom poses the silicate of soda Forming carbonate of soda and gelatinous silica, which latter combines with the sue-rate of lime forming the hard and durable silicate of lime which is not easily washed away and which morc with a solution somewhat elastic and Serial No. 603,689.

effectively and durably binds the rock or gravel together. The carbonate of soda and the sugar go to waste.

The sucrate of lime and silicate of soda below the surface of the road and not are posed to the atmosphere remain ruidecomgelatinous silicate formed in the manner he ore described, to produce silicate of lime.

In some cases I ma make a road byfirst forming a bed of suitable material in anysuitable way, and I then cover the bed with finely crushed limestone or the like mixed of sucrate of lime, silicate of soda and a suitable quantity of a bituminous compound which will make the surface smooth. The presence of the sucratealkaline solution largely prevents the volatilization of the volatile compounds in. the bitumen.

sucrate of lime and an alkaline silicate with limestone or the like and molding or shaping the compound to suitable form.

The lime present in the road combines with water and the carbonate of soda formed in the manner above described to produce a. 85

cement whicln assists in binding the or broken rock in the matrix.

hen the road is formed. in the manner above described the matrix hargdenslhroughout. sullicicntly to hold the cri'ished rock or gravel in place but the surface of the road where silicate of lime is formed is particularly hard and durable and is not easily washed away.

gravel I may also form paving blocks by'combming a solution of ln my Patent No. 987,591 of March 21395 1911, I have claimed a solution tor use in making roads comprising sucrate of lime and an alkaline silicate, and l have claimed a method of producing such solution.

it- Will be unrlcrstood that some or all of the materials employed may be mixed before they are laid on the road boil or they can be mixed while being laid on the road bed.

I claim as my invention: l l. A road, composed 0f lii'neroeliz, sucrete of-lime, an alkaline silicate and crushed reel; or gravel.

A road, emisisting of secrete of lime, an alkaline silicate, crushed rock or gravel,

m1 bitumen 3. A road, consisting of suerete 0f lime an alkaline silicate ande roecl metal.

l 4. The herein described method of forming a road, which COIlSiStS lIi preparing" the road bed, mixing in siiitable pl'eportions g r v 996,513

suerate of lime andaxi alkaline silicate and laying said mixture with suit-able road metal on the road bed, thus producing calcium 15 EDWARD ALFRED PATERSOIN.

Witnesses LLOYD B. VVYHT, A. M. PARKINS." 

